Google is developing this new opensource plugin which wraps native C/C++ code and makes it deployable to web browsers. It already supports SDL - Quake has been ported.
There's obviously a huge potential for GLBasic to develop browser-based executables.
Here's what's it all about:
http://arstechnica.com/news.ars/post/20081209-safer-than-activex-a-look-at-googles-native-client-plugin.html (http://arstechnica.com/news.ars/post/20081209-safer-than-activex-a-look-at-googles-native-client-plugin.html)
http://google-code-updates.blogspot.com/2008/12/native-client-technology-for-running.html (http://google-code-updates.blogspot.com/2008/12/native-client-technology-for-running.html)
You probably won't make it to get the compilers running in this.